LOL - Dodge Charger Hellcat with it's 707-horsepower driven by Randy Pobst at Streets of Willow only managed a 1:26.87. For the record, that's 2.58 seconds slower around the track than the Mustang.
I know this really is not in line with the comparison for the subject of this thread, but for reference, the Dodge Challenger R/T 6.4 Scat Pack managed to get around faster than the Hellcat with a 1:25.76.
The lesson here is that no one car is equal to another, and horsepower does not solve all problems, though it sure will put a grin on your face.
You certainly are right on both counts. The Hellcat is 200 to 300 lbs heavier then the Challenger R/T 6.4 Scat Pack, which is your enemy on a road course track - even though the Hellcat has a "competition" suspension. There isn't much doubt that you will be smiling when you step on the "loud peddle" at a stop light - unless you are thinking about the cost of the rear tires
I have the SRT 392 (6.4 Challenger with adjustable suspension, multiple engine/transmission tunes etc.). I suspect it will outperform the R/T on a road course.
2013 Mustang GT Premium Convertible
Candy Apple Red, Auto, FRPP Tune, GT500 Axlebacks, KONI Yellow Sport (adjustable dampers), FRPP Front and Rear swaybars, Custom Removable 4 Point Roll-Bar, BOSS 302 Low Expansion Brake Lines, Roush side splitters, GT500 spoiler, Redline Tuning hood struts,18" Ford Chromed Aluminum Wheels (9R3Z-1K007-A), Michelin Pilot Super Sports - 235X50X18
2011 Mustang V6 Premium Convertible - Gone